<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>用户登录</title>
</head>
<body>
  <form action="/login" method="post">
    账号：<input name="username" type="text" />
    密码：<input name="password" type="password" />
    <button type="submit">登录</button>
  </form>
</body>
</html>